US3665053A
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Process for preparing polymers from ethylenically unsaturated glycidyl monomers
Assignee: Tokuyama Corp
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Filing: 1969-11-25
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Granted: 1972-05-23
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Expires: 1989-11-25
Abstract
Abstract In the process for the preparation of finely divided high polymers of a cross-linked structure comprising polymerizing a monoethylenically unsaturated monomer and a diethylenically unsaturated monomer, in an organic solvent, an improvement characterized in that prior to the polymerization a linear polymer selected from the group consisting of hot n-heptanesoluble monoolefin polymers, polyalkylene oxides and vinyl chloride polymers is dissolved in said organic solvent.
Inventors
- 👤 Yukio Mizutani
- 👤 Seishiro Matsuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:17
CPC Classifications
C; C08; C08F; C08F257/00; C08F257/02; C08F2/00; C08F2/04; C08F2/06; C08F2/08; C08F255/00; Y; Y10; Y10S; Y10S525/00; Y10S525/909; Y10S525/911
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
0.5 to 30 percent by weight, based on the weight of said monoethylenically unsaturated monomer (1), of a diethylenically unsaturated monomer, in an organic solvent which dissolves said monomers (1) and (2) but not the cross-linked polymer produced therefrom and not the corresponding linear polymer free of said diethylenically unsaturated monomer (2) in the presence of a free-radical initiator; the improvement wherein prior to the polymerization a linear hot n-heptane soluble monoolefin polymer is dissolved in said organic solvent in an amount of 10 to 500 percent by weight based on the total weight of monomers (1) and (2).
Claim 2
Dependent Claim
29 words
The process of claim 1 wherein said organic solvent is present in an amount of more than 300 percent by weight based on the total weight of the monomers.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein said organic solvent is selected from the group consisting of aliphatic hydrocarbons, aliphatic alcohols of up to 8 carbon atoms, and linear or cyclic aliphatic ethers.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein said monoethylenically unsaturated monomer (a) is a glycidyl ester of an ethylenically unsaturated carboxylic acid.
Claim 5
Dependent Claim
43 words
The process of claim 1 wherein said monoolefin polymer is expressed by the formula: wherein R1 represents hydrogen, an alkyl group of up to 4 carbon atoms or phenyl; and R2 represents hydrogen or an alkyl group of up to 4 carbon atoms.
Claim 6
Dependent Claim
29 words
The process of claim 1 wherein said monoethylenically unsaturated monomer is glycidyl methacrylate; said monoolefin polymer is an atactic ethylene-propylene copolymer; and said diethylenically unsaturated monomer is divinyl benzene.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |